Typed states for the displayed outbound observations.
Source: paper_references, paper_reference_links
Paper Citation Record · LEDGER
Upper bound on the radii of regular ultra-compact star photonspheres
As of 18 August 2026, this Paper Citation Record lists 0 of 0 outbound references and 1 inbound Pith citation observation for arXiv:1812.04257.
A citation records a reference. It does not transfer a finding from one paper to another.
Coverage vector
One-hop event checks from named stored sources.
Source: scholarly_work_events, retraction_status_cache, observed 2026-08-18T06:34:40.430872+00:00
Pith citing papers itemized under the disclosed page cap.
Source: paper_references, paper_reference_links, observed 2026-08-01T09:17:01.107401Z
A source-named dated measurement, never combined with another source.
Source: cited_works
Reference resolution
0 of 0 outbound references displayed
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External citation measurements
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Outbound references
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Pith citing papers
Observation 3ed57afd-b9b6-4ccb-a25e-851254b5db97 · inbound
Static spheres in black hole spacetimes: pairing, energy conditions, and an upper bound on the innermost radius cites this paper.
Static spheres in black hole spacetimes: pairing, energy conditions, and an upper bound on the innermost radius Upper bound on the radii of regular ultra-compact star photonspheres
Reference 15
- Resolution
- unresolved
- no resolver link, observed 2026-08-01T09:17:01.107401Z
Source-reported events for the cited work
Unavailable: canonical work link unavailable.